Evil. Continuing concerns about North Korea's potential to develop nuclear missiles led in 2003 to the six-party talks that included North Korea, South Korea, the US, Russia, China, and Japan. In 2006, however, North Korea resumed testing missiles and on 9 October conducted its first nuclear test. The 15 June 2000 Joint Declaration that the two leaders signed during the first South-North summit stated that they would hold the second summit at an appropriate time. It was originally envisaged that the second summit would be held in South Korea, but that did not happen. South Korean President Roh Moo-hyun walked across the Korean Demilitarized Zone on 2 October 2007 and traveled on to Pyongyang for talks with Kim Jong-il. The two sides reaffirmed the spirit of 15 June Joint Declaration and had discussions on various issues related to realizing the advancement of south–north relations, peace on the Korean Peninsula, common prosperity of the people and the unification of Korea. On 4 October 2007, South Korean President Roh Moo-hyun and North Korean leader Kim Jong-il signed a peace declaration. The document called for international talks to replace the Armistice which ended the Korean War with a permanent peace treaty. During this period political developments were reflected in art. The films Shiri, in 1999, and Joint Security Area, in 2000, gave sympathetic representations of North Koreans. Sunshine policy ends Lee Myung-bak government The Sunshine Policy was formally abandoned by the new South Korean President Lee Myung-bak in 2010. On 26 March 2010, the 1,500-ton ROKS Cheonan with a crew of 104, sank off Baengnyeong Island in the Yellow Sea. Seoul said there was an explosion at the stern, and was investigating whether a torpedo attack was the cause. Out of 104 sailors, 46 died and 58 were rescued. South Korean President Lee Myung-bak convened an emergency meeting of security officials and ordered the military to focus on rescuing the sailors. On 20 May 2010, a team of international researchers published results claiming that the sinking had been caused by a North Korean torpedo; North Korea rejected the findings. South Korea agreed with the findings from the research group and President Lee Myung-bak declared afterwards that Seoul would cut all trade with North Korea as part of measures primarily aimed at striking back at North Korea diplomatically and financially. North Korea denied all such allegations and responded by severing ties between the countries